1. F. I. Fedorov, Zh. Prikl. Spektrosk., 2, No. 6, 523–533 (1965).
2. F. I. Fedorov, Optics of Anisotropic Media [in Russian], Izdat. Akad. Navuk BSSR, Minsk (1958).
3. F. I. Fedorov, Theory of Hypotrophy [in Russian], Nauka i Tekhnika, Minsk (1976).
4. L. M. Barkovskii and A. N. Furs, Operator Methods for Describing Optical Fields in Complex Media [in Russian], Bel. Navuka, Minsk (2003).
5. L. M. Barkovskii and A. N. Furs, Opt. Spektrosk., 90, No. 4, 632–639 (2001).